INDEX. 
531 
Schwarzenberg’s Life of Humboldt 220 
Science Gossip 89 
Scientific Summary, 91, 223, 355, 485 
Scott on “ The British Hemiptera ” 82 
Sea-side Studies in N atural History. 
By Agassiz 213 
Sea- weeds, Colouring Matter of. . 358 
„ Petroleum formed from 365 
Seeman, Berth old, on Australia 
and Europe 18 
Sensitive Test for Acids 363 
Sewage, Value of 223 
Shetland Isles, Flora of the 231 
Ship-building, Iron. By W. Fair- 
bairn 86 
Siberia, Birds of 136 
Sight and Hearing, Defects of. By 
T. W. Jones 483 
Silicates 364 
Silk-spider 390 
Silk-worm, Ailanthus v . . 264 
„ Diseases of the 523 
,, Development 102 
Silurian Rocks of Ayrshire 501 
Silver, Chemical Means of Cleaning 236 
„ Separation of, from Lead . . 251 
Skin, Absorptive Power of the . . 508 
Slide, Growing, New 116 
Smoky Chimneys. By F. Edwards 222 
Soda from Cryolite, to obtain .... 252 
„ from Salt, to obtain 496 
Solancese, Seeds of the 361 
Solar Action, Treatise on. By 
T. Ayers 90 
Solfatara and Fumaroles of Naples. 
By Prof. Ansted 198 
Sorby, H. C. on the Sepctrum- 
Microscope 66 i 
Sounding, Electricity in 129 
Spectroscope, New 519 
Spectrum of Comet 258 
„ Analysis .... 129, 260, 261 
„ Microscope 66 
Sphserise, Fructification in the . . 98 
Sphymograph, the 374 
,, in Comparative 
Physiology Ill 
Spiders, J. Black wall on 161 
,, Fossil 104 
Spinal Vessels 97 
Spinele, Black 509 
Sponge, Sarcodic Tissue of 523 
Spleen, its Regeneration Con- 
sidered 245 
Spontaneous Generation 490 
Star Maps. By R. A. Proctor . . 348 
Steam, Friction of. 503 
Steam-engines, Expansion in .... 369 
Stone Age, Researches on the. . . . 499 
Structure of Animal Life, the. 
By M. C. Cooke 213 
Stylodon Pusillus, Fossil Remains 368 
YOL. Y. NO. XXI. 
Sugar, Lime in Extracting 364 
Summer, Our 379 
,, Rambles. By L. H. 
Grindon 352 
Sun-force and Earth-force. By 
Dr. Richardson 327 
Sun-spots 226 
Sun’s Photosphere, the 91 
Tape-worms. By T. S. Cobbold 478 
Taylor, J. T. on Engraving with a 
Sunbeam 145 
j Telegraph, Wheatstone’s New. ... 259 
Telescope, the. By R. A. 
Proctor 279, 462 
Telescope, Small 95 
Temperature of the Body 371 
Temple’s Comet, Spectrum of . . . . 258 
Terebriporse, the . . . 521 
Test-plates, Nobert’s 250 
Testa of the Seeds of the Solancese 361 
Thermo-electric Battery 261 
Tiber, Fossils from the 239 
Tigridia, Fertilization of 232 
Timbs’s Year-book of Facts 221 
Trichina, by whom Discovered . . 242 
„ Specimens of 250 
,, Commission, the 244 
Tube Sublimates, Antimony in . . 99 
Tunnel under the English Channel 503 
Turnips, Insects Injurious to ... . 1 
Tyres, Steel, New Mode of Manu- 
facturing 510 
Urea in the Kidneys 243 
Utric Acid, Test for 234 
Vapour Densities 389 
Variegated Leaves and Double 
Flowers . 229 
Vegetable Parasites 96 
Vertebrates, Accessory Eyes in . . 263 
„ Anatomy of 345 
„ Muscular Fibres of 
the Heart of 264 
Voelcker, A., on Milk and its 
Adulterations 177 
Volatile Hydro-Carbons 100 
Volcanic Ash, Fossils in . 238 
Volvox Globator. J. B. Hicks on 
the 137 
Wad 121 
Water, Resistance of 502 
,, Supply to Towns ........ 2^1 
Weather Foreknowledge 248 
Welch Gold 251 
Wheatstone’s New Telegraph. . . . 259 
Wheels of Chirodita, the 381 
White Phosphorus, Nature of. . . . 101 
Williamson, Prof, on the Amoeba 188 
Wolffia Arrhiza in England 491 
2 o 
